Print Item Hayden Company is considering the acquisition of a machine that costs $408,000. The machine is expected to have a useful life of 6 years, a negligible residual value, a annual net cash flow of $84,000, and annual operating income of $71,400. What is the estimated cash payback period for the machine (round to one decimal points)? Oa. 5.7 years Ob. 69 years Oc. 49 years Od. 12 years